OpenIdentityPlatform OpenAM up to 15.x JSON File Parser claims_parameter_supported injection

Summaryinfo

A vulnerability, which was classified as problematic, has been found in OpenIdentityPlatform OpenAM up to 15.x. This affects the function claims_parameter_supported of the component JSON File Parser. Performing a manipulation results in injection. This vulnerability is known as CVE-2025-64099. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in OpenIdentityPlatform OpenAM up to 15.x. This affects the function claims_parameter_supported of the component JSON File Parser. The manipulation with an unknown input leads to a injection vulnerability. CWE is classifying the issue as CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Open Access Management (OpenAM) is an access management solution. In versions prior to 16.0.0, if the "claims_parameter_supported" parameter is activated, it is possible, thanks to the "oidc-claims-extension.groovy" script, to inject the value of one's choice into a claim contained in the id_token or in the user_info. In the request of an authorize function, a claims parameter containing a JSON file can be injected. This JSON file allows attackers to customize the claims returned by the "id_token" and "user_info" files. This allows for a very wide range of vulnerabilities depending on how clients use claims. For example, if some clients rely on an email field to identify a user, an attacker can choose the email address they want, and therefore assume any identity they choose. Version 16.0.0 fixes the issue.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-64099 since 10/27/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1055 according to MITRE ATT&CK.

Upgrading to version 16.0.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-131956). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

• OpenIdentityPlatform

Name

• OpenAM

Version

• 15.x

Website

• Product: https://github.com/OpenIdentityPlatform/OpenAM/

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion